Am just register for Antenatal last week monday i did not register in …

Am just register for Antenatal last week monday i did not register in time due to i traveled for my dad burial but as i register doc exermine me nd told me i register late which is bad but he said am 25 weeks nd 3days pregnant but scan told me that am 21 nd 5days pregnant i show the doc the scan result he see it nd exermine me again it shows 25 weeks&3days now i dont knw the one to beleive again bcoz scan experted date for delivery is may 29 while hospital is April 30